package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.DishDTO;
import com.sky.dto.DishPageQueryDTO;
import com.sky.entity.Category;
import com.sky.entity.Dish;
import com.sky.entity.DishFlavor;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.*;
import com.sky.result.PageResult;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.ArrayList;
import java.util.List;


@Service
@Slf4j
public class DishServiceImpl implements DishService {

    @Autowired
    private DishMapper dishMapper;

    @Autowired
    private DishFlavorMapper dishFlavorMapper;

    @Autowired
    private SetmealDishMapper setmealDishMapper;


    @Override
    public PageResult pageQuery(DishPageQueryDTO dishPageQueryDTO) {
        if (dishPageQueryDTO.getName()!=null || dishPageQueryDTO.getCategoryId()!=null || dishPageQueryDTO.getStatus()!=null){
            PageHelper.startPage(1,dishPageQueryDTO.getPageSize());
        }else{
            PageHelper.startPage(dishPageQueryDTO.getPage(),dishPageQueryDTO.getPageSize());
        }
        Page<DishVO> dishes=dishMapper.pageQuery(dishPageQueryDTO);
        return new PageResult(dishes.getTotal(),dishes.getResult());

    }

    @Override
    @Transactional
    public void addDish(DishDTO dishDTO) {
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO,dish);
        dishMapper.addDish(dish);

        Long id = dish.getId();
        log.info("id值为：{}",id);
        List<DishFlavor> flavors = dishDTO.getFlavors();

        if (flavors !=null && flavors.size()>0){
            flavors.forEach(dishFlavor -> {
                dishFlavor.setDishId(id);
            });
            dishFlavorMapper.addDishFlavor(flavors);
        }



    }

    @Override
    public DishVO getByIdWithFlavor(Long id) {
        Dish dish=dishMapper.getById(id);
        List<DishFlavor> dishFlavors= dishFlavorMapper.getByDishID(id);
        DishVO dishVO = new DishVO();
        BeanUtils.copyProperties(dish,dishVO);
        dishVO.setFlavors(dishFlavors);
        return dishVO;
    }

    @Override
    @Transactional
    public void changeDish(DishDTO dishDTO) {
        List<DishFlavor> flavors = dishDTO.getFlavors();
        if (flavors!=null && flavors.size()>0){
            dishFlavorMapper.delete(dishDTO.getId());
            flavors.forEach(flavor->{
                flavor.setDishId(dishDTO.getId());
            });
            dishFlavorMapper.addDishFlavor(flavors);
        }
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO,dish);
        dishMapper.changeDish(dish);
    }

    @Override
    public void startOrStop(Integer status,Long id) {
        Dish dish = new Dish();
        dish.setStatus(status);
        dish.setId(id);
        dishMapper.changeDish(dish);
    }

    @Override
    @Transactional
    public void deleteDishs(List<Long> ids) {
//        可以一次删除一个菜品，也可以批量删除菜品
//        起售中的菜品不能删除
//        被套餐关联的菜品不能删除
//        删除菜品后，关联的口味数据也需要删除掉
        List<Long> passableDeleteIds = new ArrayList<>();
        ids.forEach(id->{
            Dish dish = dishMapper.getById(id);
            if (dish.getStatus() == StatusConstant.ENABLE){
                throw new DeletionNotAllowedException(MessageConstant.DISH_ON_SALE);
            }
        });
        List<Long> setmealIds= setmealDishMapper.getSetmealIdsByDishIds(ids);
        if (setmealIds!=null && setmealIds.size()>0){
            throw new DeletionNotAllowedException(MessageConstant.DISH_BE_RELATED_BY_SETMEAL);
        }
        dishMapper.deleteDishs(ids);
        dishFlavorMapper.deletes(ids);

    }

    @Override
    public List<Dish> getByCategoryId(Long categoryId) {
        List<Dish> dishs = dishMapper.getByCategoryId(categoryId);
        return dishs;
    }

}
